Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab9a2c90d47c9c2…

MALICIOUS

PDF

63.8 KB Created: 2020-11-12 22:17:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d888345012c69980a38e5686f96d2859 SHA-1: bdf269609b18d9c5559e8db492b955a581219c30 SHA-256: 8ab9a2c90d47c9c2421c40631b8d718aab202287c403ed62674207bfc15f6a7f
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The file contains a large number of embedded URLs, suggesting a link farm or phishing attempt. While no scripts were extracted, the presence of numerous external links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/aws?utm_term=vidya+vox+closer+kabira+song++pagalworld In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5f98a7c0a88ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f86f62be3a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_5fa7cd3e7c565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f8dcb2e80f4c.pdfIn PDF document text
    • https://mafupixalikufu.weebly.com/uploads/1/3/4/6/134662523/4489098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_5f95574120ee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f98ecaa81f89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b69b1091-0da6-4cfd-9156-c7f19a6dcca2/46988964447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfbc481-3771-4aa6-a251-a92ef0780968/50028049585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1645a11f-ac45-4db5-9ec1-9c9e5715ab52/bloody_mary_folklore_real.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25c220a-5208-4810-bfc9-4ec6efa535a1/46583082035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1b2b9ef-d646-4f9b-8179-5c5b3c483b52/81740730104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1446fab8-6aac-4f6b-9664-20daf24be7ea/23820456003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02cb16bb-d443-4500-843c-d04439e82100/all_things_algebra_answer_key_2015_unit_4.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA54 5732 bytes
SHA-256: 2f840a25fc6245c0e50f0e5b52ebbb6a4088f5a94a67a0d04749e5c4e3fbba1d
font_01_sfnt_off0000ce03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE03 10760 bytes
SHA-256: f1b9f731873cb91162e4702edc10976075b3b5797e41d1b5c59929237cc9392f

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